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ROM- READ ONLY MEMORY
ROM IS ALSO CALLED BIOS CHIP - BASIC INPUT OUTPUT
SYSTEM
TYPES OF ROM
1. PROM- PROGRAMMABLE READ ONLY MEMORY
2. E PROM - ELECTRICALLY PROGRAMMABLE READ ONLY MEMORY
3. E E PROM- ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY
THERE ARE TWO TYPES OF E E PROM
1. E A ROM - ELECTRICALLY ALTERABLE PROGRAMMABLE READ ONLY MEMORY
2. FLASH MEMORY - PEN DRIVE , MEMORY CARD , I POD . E A ROM IS ALSO CALLED C MOS
RAM- RANDOM ACCESS MEMORY
TYPES OF RAM
1. S RAM- STATIC RANDOM ACCESS MEMORY
2. D RAM - DYNAMIC RANDOM ACCESS MEMORY
3. E D O RAM - ENHANCED DATA OUTPUT RANDOM ACCESS MEMORY
4. S D RAM- SYNCHRONOUS DYNAMIC RANDOM ACCESS MEMORY
5. D D R RAM - DOUBLE DATA RATE RANDOM ACCESS MEMORY
6. R D RAM - RAM BUS DYNAMIC RANDOM ACCESS MEMORY
7. V RAM - VIDEO RANDOM ACCESS MEMORY
ROM- READ ONLY MEMORY
ROM IS ALSO CALLED BIOS CHIP - BASIC INPUT OUTPUT
SYSTEM
TYPES OF ROM
1. PROM- PROGRAMMABLE READ ONLY MEMORY
2. E PROM - ELECTRICALLY PROGRAMMABLE READ ONLY MEMORY
3. E E PROM- ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY
THERE ARE TWO TYPES OF E E PROM
1. E A ROM - ELECTRICALLY ALTERABLE PROGRAMMABLE READ ONLY MEMORY
2. FLASH MEMORY - PEN DRIVE , MEMORY CARD , I POD . E A ROM IS ALSO CALLED C MOS
- C MOS - COMPLEMENTARY METAL OXIDE SEMICONDUCTOR
- E A ROM IS ALSO CALLED C MOS
RAM- RANDOM ACCESS MEMORY
TYPES OF RAM
1. S RAM- STATIC RANDOM ACCESS MEMORY
2. D RAM - DYNAMIC RANDOM ACCESS MEMORY
3. E D O RAM - ENHANCED DATA OUTPUT RANDOM ACCESS MEMORY
4. S D RAM- SYNCHRONOUS DYNAMIC RANDOM ACCESS MEMORY
5. D D R RAM - DOUBLE DATA RATE RANDOM ACCESS MEMORY
6. R D RAM - RAM BUS DYNAMIC RANDOM ACCESS MEMORY
7. V RAM - VIDEO RANDOM ACCESS MEMORY
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